nuclear degneracy:  atom: $2I+1$data for $I$nuclear spin number molecule:  totoal degeneracy: $(2I_1+1)(2I_2+1)$ for homonuclear molecule: $I(2I+1)$antisymmetric, $(I+1)(2I+1)$symmetric   examples:
 $N$: $I=1,\, g_N=2I+1=3$
 $N_2$: 3 antisymmetric, 6 symmetric
 $NO$: $I_1=1$, $I_2=0$, $3\times1=3$
  electronic degeneracy:  atom: $\Sigma_J(2J+1),\, J=|L-S|...L+S$ molecule: $^{2S+1}\Lambda_\Omega$, $\phi=1$ for $\Omega=0=\Sigma$ $\phi= 2$ for $\Omega=1,2,..=\Pi,\Delta,...$. Total degeneracy = $(2S+1)\phi=\Sigma_{\Omega}(2S+1)$  examples:
 $N: \, ^4S \quad S=3/2,\, L =0,\, J=3/2 \quad g_{elec}=4$
    
    
    Read More →
    
    
    
        
    
    It has been more than a year since I came to the graduate school. It’s hard to say how’s the lift in u.s. but one thing I can confirm is money is everything. Everybody could devote themselves, their dream for funding. It’s really a tragedy. Hope I can get UMICH’s PhD offer even if it seems hopeless now ToT.
 
This post is mainly about how to configure matlab for pbs or torque configured cluster.
    
    
    Read More →
    
    
    
        
    
    The following code is used for MPI parallel computing. The main purpose of the code is used to pack discontinuous data and scatter them averagely to other process.
for example:
In Zero process:
sendvar is a matrix, the size of it is 4 * 8, the data is below
 1  2  3  4  5  6  7  8    11  12  13  14  15  16  17  18    21  22  23  24  25  26  27  28    31  32  33  34  35  36  37  38    the number of process is npros, npros=2
    
    
    Read More →